diff tests/test-mq @ 9151:f528d1a93491

tags: implement persistent tag caching (issue548).

- rename findglobaltags() to findglobaltags1() (so the "no cache"
  implementation is still there if we need it)
- add findglobaltags2() and make findglobaltags() an alias for it
  (disabling tag caching is a one-line patch)
- factor out tagcache class with methods readcache() and writecache();
  the expensive part of tag finding (iterate over heads and find
  .hgtags filenode) is now in tagcache.readcache()

--- a/tests/test-mq	Thu Jul 16 10:39:41 2009 -0400
+++ b/tests/test-mq	Thu Jul 16 10:39:42 2009 -0400
@@ -107,9 +107,18 @@
 hg qpop
 checkundo qpop
 
-echo % qpush
+echo % qpush with dump of tag cache
 
+# Dump the tag cache to ensure that it has exactly one head after qpush.
+rm -f .hg/tags.cache
+hg tags > /dev/null
+echo ".hg/tags.cache (pre qpush):"
+sed 's/ [0-9a-f]*//' .hg/tags.cache
 hg qpush
+hg tags > /dev/null
+echo ".hg/tags.cache (post qpush):"
+sed 's/ [0-9a-f]*//' .hg/tags.cache
+
 checkundo qpush
 
 cd ..